#include<stdio.h>
int main()
{
    float a, b;
    char c;
    scanf_s("%f", &a);

    for (;;)
    {
        c = getchar();
        if (c == '\n')
            break;
        scanf("%f", &b);

        switch (c)
        {
        case '+':
            a = a + b; break;
        case '-':
            a = a - b; break;
        case '*':
            a = a * b; break;
        case '/':
            a = a / b; break;

        }
    }
    printf("Value of expression: %.1f", a);

    return 0;
}